The EMA4F1480P100D50D from ECHO Microwave is a Band Pass Filter with Frequency 1.43 to 1.53 GHz, Insertion Loss 2 dB, Rejection 50 dB @ 1180MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA4F1480P100D50D can be seen below.